Calculating-machine.



L. M. HERON.

CALCULATING MACHINE.

APPLICATION FILED OCT. I, 1912.

Patented Apr. 20, 1915.

I f .I 4 5 d l X. O/J 7 m n C .m w 3%-, .mwzzsezumuwmm I .m. q M... .u M666666666666 A g1/Wenko@ @fw/d ying secured to the rollers so that the LOUIS M. HEBON, OF WASHINGTON, DISTRICT 0F COLUMBIA.

CALCULATING-MACHINE.

l Y Specification of Letters Patent.

Patented Apr. 2o, 1915.

Application led October 1, 1912. Serial No. 723,419.

To all cg'hom 'it may concern:

vBe it known thatL LOUIS M. HnRoN, a eitizen`f the United States, residing at the city of Washington, in the District of Columbia, have invented new and useful Improvements in Calculating-Machines, of which the following is a specification.

This invention relates to certain new and useful im rovements in calculating machines, andp the primary object of the invention is to provide a machine of this type which is possessed of maximum simplicity; which embodies a minimum number of parts and which can be manufactured at an eX- ceedingly low cost.

Further the invention aims to provide novel means for actuating the web` in itsl winding movements from one roller-to the other. l .i In the drawings: Figure 1 is a top'plan view of the `invention; Fig. 2 is a similar view showing the cover plate removed; Fig. 3 is a section on the line 3-3 of Fig. l;

F1 4 is a section on the line of Fig. 2; Fig. 5 is a section on the line 5-5 of Fig. 2.

The invention includes a casing 1, preferably rectangular in form, in which a pa1r of spaced parallel rollers 2 and 3 are 1eurnaled. Roller 2 has a crank 4 secured thereto to enable manual rotation thereof. p The rollers are preferably, though not necessarily, reduced in diameter at 5 to receive a tape or cord 6 which has one end secured to roller 3, whereby it will-be seen that when roller 2 is given clockwise movement, the tape 6 will be wound thereon. A web 7 has one end secured to roller 3, the web bei-3 par thereof between the rollers crosses that part of the tape 6 between the rollers, so that as the tape 6 is wound on roller 2, the web 7 will beunwound from vroller 2, and the ta will unwind from roller 3 and actuate t e latter and will wind the web on said roller 3. Thus the web performs a dual function, namely that of actuating the roller 3 when 'the tape 6 is being unwound from roller 2 and also its usual function of bearing the figures that represent the mathematics calweb is casing by any suitable fastening means.` The cover, between the slots 8 and 9 bearsv a' column of figures from 1 to 15 an'd the legend Times are so that in use the column of figures exposed through slot 8 form the multipliers`- and the column of vfigures borne by` thecover form the multiplicands, while the figures of the column exposed through slot 9 indicate the products. The columns vof figures that represent the multipliers and those that represent the products are arranged so that the correct products will appear through the slot 9 when the lmultipliers appear through slot 8. From the above it will be evident that the device is extremely simple, compact and can be made and assembled with little cost.

What is claimed is:

In a calculating machine, a casing, a pair of rollers journaled in the casing, means to manually operate one of the rollers, a flexible connection between the rollers rigidly connected at its ends to the rollers whereby when the connection is wound on the manually operated roller the other roller will rotate with said manually operated roller but in an opposite direction from the latter, and a web bearing guresconnected to the rollers so that when the flexible lconnection is unwound from the manually operated roller the web will actuate the other roller. 1.

2. In combination with a casing, a pair of spaced rotary rollers therein, means to manually o erate one of the rollers, and a pair of eXible connections between the rollers whereby clock-wise or anti-clock-wise movement of either roller will cause opposite rotation of the other roller, rotation of either roller causing one of the pair of fiexi ble connections to be Wound on that roller my hand in presence of two subscribing and unwound from the other roller and the witnesses. A other connection to be unwound from the LOUIS M. HERON. rst mentioned roller and wound on the Witnesses:

5 said other roller. W. H. Emmon,

In testimony whereof I have hereunto set ROYCE A. Runes. 

